ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test1.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test1.yuv
ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test2.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test2.yuv
ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test3.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test3.yuv
ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test4.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test4.yuv
ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test5.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test5.yuv
ffmpeg -s 1280x720 -i ./jpg2yuv42sp_1/test6.jpg -pix_fmt nv12 ./jpg2yuv42sp_1/test6.yuv

